I wrote the other day about introducing my niece Chloe to the wonderful world of orgasms. It wasn’t long after that when she and her boyfriend Mark came over together to use the pool. They were a great looking couple. Like I said before, Chloe is a classic California cheerleader. Tall, thin, leggy, with long blond hair. My chest is bigger than hers, but her firm boobs really pop off of her slender frame. Mark has dark hair and obviously spends a lot of time in the gym. Not the brightest bulb, but great eye candy.

I had run some errands and left them alone. When I came back, they seemed to have moved into my guest room, because I hadn’t been home long before I heard Chloe say “Damn it.” I opened the door to check on her and found her splayed naked across the bed. Mark was laying between her legs. Clearly he had been eating her out, and apparently not to her satisfaction.

They both saw me before I could shut the door again, so I apologized. Neither seemed at all embarrassed. Of course, I’d been between Chloe’s legs myself. Chloe complained “He’s trying, but Mark still isn’t able to get me off.” Mark got defensive and said that the problem had to be her. I tried to calm things down, telling Mark that even if he was right that Chloe was having trouble relaxing enough to climax, it was his job to help her and not to get frustrated.

Mark agreed, but still insisted that his technique was sound. “I bet that I could make you cum with no problem.” he boasted. Chloe stunned me when she said that she’d like to see him try, and that maybe I could teach him a thing or two. As soon as I was sure she was serious I was on board, and I pulled off my sundress and pulled down my panties. Chloe made room for me on the bed. Mark knelt on the floor and positioned me so that crotch was right at the edge.

Initially, his technique was pretty poor. He went right for my clit before I was warmed up, too hard, and I could literally tell that he was drawing to draw the alphabet with his tongue. With some coaching, though, he improved, and while it took some time he did eventually get me off. I didn’t see fireworks, but I came.

Chloe insisted that he put his new knowledge to use on her. I watched as he dove back down between her legs. “Mm, better.” she moaned. Soon her hips were gyrating and her eyes were closed. I could tell from the sounds that Mark was making that she was thoroughly wet. Still, she seemed to have trouble getting over the edge. I didn’t know if Mark knew that I had gone down on Chloe myself, or what he would think about my touching her. Still, nothing that had happened so far had fazed him. So I leaned over and sucked one of Chloe’s pink nipples into my mouth, circling my tongue around it. I could feel it harden. And maybe that was the missing ingredient, because after just a minute of this extra attention her hips bucked and she gasped as the climaxed. Finally Mark had managed to make her cum. At least he did most of the work.

At this point Chloe was in the middle of the bed, and I was on one side. Mark came and lay next to her. Seeing her cum had obviously turned him on, because his cock was hard as a rock. Long and thick, it was a monster.

Mark bragged “Now I have a magic tongue to go with my magic cock.” He stroked himself and grinned. “The tongue may still need some practice.” Chloe told him. “But it is a magic cock.” She pressed him on his back and climbed on top. Reaching down she positioned his prick and slid down on to it. Honestly, she’s so slim that I don’t know where she put it. I expected to see the tip poking out of her bellybutton. Watching her ride him brought back memories of watching her on horses when she was growing up. I was torn between feeling proud as an aunt that my niece was so beautiful and aroused by watching a hot young couple screw their brains out.

Then just as I could see he was really getting into it, she climbed off and starting to work him with her hand. “How come I never get to finish inside you when we don’t have a condom?” Mark bitched. “You know why. The doctor said that I can’t take the pill.” Mark clearly wasn’t happy with this answer. I told them that I might have a condom in the nightstand, but Mark clearly needed a magnum and that I had never had a need to keep those around. Mark asked if I was on the pill and without thinking I admitted that I was. He looked hard at Chloe.

She smiled. “Okay, just this once. As a treat.” She traded positions with Mark, and now I mounted him. As I slid down the first time I sucked in air. He was hitting spots that I don’t think had ever been touched before. I wasn’t sure where I was putting it, either. He reached up for my tits, squeezing them through my bra. Then Chloe unhooked it, and my D cups swung free. “I wish that I had inherited those.” Chloe said. I think Mark wished that, too; he couldn’t decide whether to grope them or watch them bounce as I found my rhythm. Chloe whispered in my ear “I told you that I’d pay you back.”

I didn’t think that I could be entered any more deeply. But I was wrong, because after a few minutes Mark flipped me over on my back. In this position he got maximum penetration. It felt like his cock was going to split me in two. Something big was building. I heard moaning and realized that it was mine. I got tunnel vision. Unlike Chloe, I cum easily. You teeny weeny guys may be out of luck, but it doesn’t take 10 inches to get me off. Up until now, though, all of my really big orgasms, the ones I remember, had come through my clit. Not this time, though. My pussy was throbbing with every stroke, and Mark was building up speed. I heard myself begging him to fuck me harder and felt him complying. My hips were coming up to meet him, trying to get him deeper still. My whole world was that big hard prick inside me. And then my climax hit and I was convulsing, shuddering, squeezing him. But he just kept fucking me harder and deeper, and I just kept cumming. Half the neighbors on the block must have heard me screaming. It seemed like forever before I felt him spray inside me and slide wetly out.

I looked over and saw Chloe laying next to me, he mouth wide open. Did she regret letting Mark screw my brains out? To be honest, right then, I’m not sure that I would have cared. It felt too good. But then she said “That was… awesome! I’m going to learn to cum like that.” And then she kissed me.